Prism Johnson Sales Officer Interview Questions, Process, and Tips

Mix ratios vary depending on the type of mix design.

• For concrete mix design, the ratio of cement, sand, and aggregate varies depending on the strength required.

• For asphalt mix design, the ratio of asphalt binder, aggregates, and filler varies depending on the type of asphalt mix.

• For soil stabilization mix design, the ratio of cement, lime, and soil varies depending on the type of soil and the desired strength.

• For plast...read more

Chlorine penetration test is a method to determine the effectiveness of a material against chlorine penetration.

• The test involves exposing the material to a solution of chlorine for a specified period of time.

• After exposure, the material is rinsed and dried, and then tested for any signs of chlorine penetration.

• The test is commonly used in the evaluation of protective clothing and equipment for use in chlorine handling...read more

Cracks in concrete can occur due to various reasons such as shrinkage, settlement, overload, and weathering.

• Shrinkage due to loss of moisture during curing

• Settlement due to inadequate soil compaction

• Overload due to excessive weight or traffic

• Weathering due to freeze-thaw cycles or exposure to chemicals

• Improper mix design or placement techniques

• Corrosion of reinforcing steel

• Structural defects or design flaws

Segregation is the separation of coarse and fine particles in concrete mix, while bleeding is the upward movement of water in concrete.

• Segregation occurs when the concrete mix is not properly mixed or when it is transported over long distances.

• Bleeding happens when the water in the mix rises to the surface and evaporates, leaving behind voids and weak spots.

• Both segregation and bleeding can weaken the concrete and redu...read more

Fiber-reinforced concrete is a special type of concrete that contains fibers to increase its strength and durability.

• Fibers can be made of steel, glass, synthetic materials, or natural materials like coconut fibers.

• Fiber-reinforced concrete is commonly used in construction of bridges, tunnels, and other infrastructure projects.

• The fibers in the concrete help to distribute the load more evenly, reducing cracking and inc...read more